Series RPVM1 Residential Purge and Balancing Valves are used in heating applications on boiler return piping to facilitate removal of air from heating zones on initial fill and to control water flow through circulation loop. It also serves as a shutoff valve and a drain valve for each zone or loop. It consists of a one-piece brass body construction, plated brass ball, virgin PTFE seats, hose thread connection for purging, and a cast aluminum purge port handle. Available in threaded outlet x solder inlet, and solder x solder connections in ¾, 1 and 1-1/4 inch sizes. Series RPVM1 provides high-volume purging, accurate balancing, a positive drip-tight shutoff, and is ideal for use in hydronic heating loops. Maximum Working Pressure: 50psi (344.8kPa).